Title :
Some superconducting characteristics of Nb/sub 3/Al composite wires prepared by rapid-quenching process
Author :
Fukuda, K. ; Iwaki, G. ; Hosono, F. ; Sakai, S. ; Iijima, Y. ; Takeuchi, T. ; Inoue, K. ; Kobayashi, N. ; Watanabe, K. ; Awaji, S.
Author_Institution :
Hitachi Cable Ltd., Ibaraki, Japan
fDate :
6/1/1997 12:00:00 AM
Abstract :
Multifilamentary Nb/sub 3/Al superconducting wires for high field magnets above 20 T have been developed by a rapid-quenching process. A long length wire was produced, and a coil was fabricated using the wire. J/sub c/ of this wire was 195A/mm/sup 2/ at 20 T, 4.2 K and 486A/mm/sup 2/ at 20 T, 1.8 K, B/sub c2/ of the coil was 24.6 T at 4.2 K and 26.9 T at 1.8 K and the T/sub c/ was 17.8 K. In addition to investigating the stability, the residual resistance ratio was measured, the value was 16.9. Scattering of J/sub c/ in the longitudinal direction was examined and found to be within /spl plusmn/10%.
Keywords :
aluminium alloys; critical current density (superconductivity); magnetisation; materials preparation; multifilamentary superconductors; niobium alloys; rapid solidification; superconducting coils; superconducting critical field; superconducting transition temperature; 1.8 K; 17.8 K; 20 T; 24.6 T; 26.9 T; 4.2 K; J/sub c/ scattering; Nb/sub 3/Al; coil fabrication; high field magnets; jelly-roll process; long length wire; multifilamentary Nb/sub 3/Al superconducting wires; rapid-quenching process; residual resistance ratio; stability; superconducting characteristics; Billets; Heat treatment; Magnetic materials; Multifilamentary superconductors; Niobium; Scattering; Superconducting cables; Superconducting coils; Superconducting filaments and wires; Superconducting magnets;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
